EP0232128A3 - Filtering devices - Google Patents

Filtering devices

Info

Publication number
EP0232128A3
EP0232128A3 EP87300772A EP87300772A EP0232128A3 EP 0232128 A3 EP0232128 A3 EP 0232128A3 EP 87300772 A EP87300772 A EP 87300772A EP 87300772 A EP87300772 A EP 87300772A EP 0232128 A3 EP0232128 A3 EP 0232128A3
Authority
EP
European Patent Office
Prior art keywords
screen
shower
nozzles
centre
locations
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP87300772A
Other languages
German (de)
French (fr)
Other versions
EP0232128A2 (en
Inventor
James Denis Hudon
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Albany International Corp
Original Assignee
Albany International Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Albany International Corp filed Critical Albany International Corp
Publication of EP0232128A2 publication Critical patent/EP0232128A2/en
Publication of EP0232128A3 publication Critical patent/EP0232128A3/en
Withdrawn legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/66—Pulp catching, de-watering, or recovering; Re-use of pulp-water
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/01—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements
    • B01D29/018—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements ring shaped
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/62—Regenerating the filter material in the filter
    • B01D29/64—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element
    • B01D29/6438—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element nozzles
    • B01D29/6446—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element nozzles with a rotary movement with respect to the filtering element
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/88—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices
    • B01D29/90—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices for feeding
    • B01D29/902—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices for feeding containing fixed liquid displacement elements or cores
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
    • D21D5/00—Purification of the pulp suspension by mechanical means; Apparatus therefor
    • D21D5/02—Straining or screening the pulp
    • D21D5/04—Flat screens
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2201/00—Details relating to filtering apparatus
    • B01D2201/48—Overflow systems

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Paper (AREA)
  • Filtration Of Liquid (AREA)

Abstract

A filtering device suitable for use in, for example, the papermaking industry has a generally-horizontal circular screen (7) onto which the liquid to be filtered flows from a tank (l) around the periphery of the screen. Solids filtered out of the liquid remain on the screen and are moved by a shower (l8) to an outlet (6) at the centre of the screen. The shower (l8) comprises several horizontal spray bars which extend radially across the screen and rotate about an axis at the centre of the screen. Each bar has a set of nozzles (l9), the locations of which are staggered with respect to the nozzle locations on the other bars. This ensures that the impact areas of one set of nozzles (l9) on the screen (7) do not follow the same paths over the screen as the preceding set of nozzles so that a more even coverage of the screen by the shower (l8) is achieved.
EP87300772A 1986-01-31 1987-01-29 Filtering devices Withdrawn EP0232128A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8602365 1986-01-31
GB868602365A GB8602365D0 (en) 1986-01-31 1986-01-31 Filtering devices

Publications (2)

Publication Number Publication Date
EP0232128A2 EP0232128A2 (en) 1987-08-12
EP0232128A3 true EP0232128A3 (en) 1988-07-13

Family

ID=10592276

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87300772A Withdrawn EP0232128A3 (en) 1986-01-31 1987-01-29 Filtering devices

Country Status (3)

Country Link
EP (1) EP0232128A3 (en)
FI (1) FI870409A (en)
GB (1) GB8602365D0 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5152891A (en) * 1990-09-13 1992-10-06 T/M Industrial Supply, Inc. Self-cleaning strainer
US5259955A (en) * 1991-07-10 1993-11-09 Bolton Joseph A Vacuum strainer
US5453193A (en) * 1994-01-04 1995-09-26 Thermo Fibertek Inc. Strainer

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE952492C (en) * 1953-02-12 1956-11-15 Ernst Gustav Drautz Sorters, knots, knots and splinters for the paper, cardboard, fiber board, wood pulp and cellulose industries
AT193713B (en) * 1942-01-13 1957-12-10 Nils Walfrid Joensson Device for sieving, dewatering or washing pulp suspensions
AT338608B (en) * 1974-10-11 1977-09-12 Voith Gmbh J M DEVICE FOR SEPARATING LARGE MATERIAL FROM FIBER FLUSHING

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT193713B (en) * 1942-01-13 1957-12-10 Nils Walfrid Joensson Device for sieving, dewatering or washing pulp suspensions
DE952492C (en) * 1953-02-12 1956-11-15 Ernst Gustav Drautz Sorters, knots, knots and splinters for the paper, cardboard, fiber board, wood pulp and cellulose industries
AT338608B (en) * 1974-10-11 1977-09-12 Voith Gmbh J M DEVICE FOR SEPARATING LARGE MATERIAL FROM FIBER FLUSHING

Also Published As

Publication number Publication date
EP0232128A2 (en) 1987-08-12
FI870409A (en) 1987-08-01
FI870409A0 (en) 1987-01-30
GB8602365D0 (en) 1986-03-05

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Inventor name: HUDON, JAMES DENIS